java实现文件系统增量备份的实例
使用该程序可以找到指定目录下最近修改过的文件，最后生成一个压缩文件列表。感兴趣的可以运行一下。#BackupApp .java
package com.etwealth.wms;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class BackupApp {
private StringBuffer strBuf = null;
private static StringBuffer fileNameBuf = new StringBuffer();
private Properties prop = new Properties();
static final int buffer = 2048;
public static void main(String[] args) throws Exception {
BackupApp app = new BackupApp();
System.out.println("Start......");
System.out.println("Start delete the dst folder......");
app.delete();
System.out.println("Start create the dst folder......");
app.mkdir();
System.out.println("Start copy src folder to dst folder......");
app.copy();
System.out.println("Start compress dst folder......");
app.compress();
System.out.println(fileNameBuf);
System.out.println("End!");
}
public void mkdir() {
try {
InputStream is = getClass().getResourceAsStream("/config.properties");
prop.load(is);
String dest = prop.getProperty("dst");
String zipdir = prop.getProperty("zipdir");
File f = new File(dest);
File zipFile = new File(zipdir);
if (f.exists() == false) {
f.mkdirs();
}
if (zipFile.exists() == false) {
f.mkdirs();
}
}
catch (Exception e) {
System.out.println(e);
}
}
public void copy() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDate = sdf.format(new Date());
try {
InputStream is = getClass().getResourceAsStream("/config.properties");
prop.load(is);
String[] src = prop.getProperty("src").split(",");
String dest = prop.getProperty("dst");
for (int i = 0; i < src.length; i++) {
File file = new File(src);
getAllFiles(file, currentDate, dest, src);
}
is.close();
}
catch (Exception e) {
System.out.println(e);
}
}
public void compress() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDate = sdf.format(new Date());
boolean flag=false;
try {
InputStream is = getClass().getResourceAsStream("/config.properties");
prop.load(is);
String zipDir = prop.getProperty("zipdir");
String destDir = prop.getProperty("dst");;
File filein=new File(destDir);
File[] file=filein.listFiles();
for(int i=0;i<file.length;i++){
if(file.isDirectory()||file.length()>0){
flag=true;
break;
}
}
if(flag==true){
File fileout = new File(zipDir);
if(fileout.exists()==false){
fileout.mkdir();
}
String strAbsFilename = fileout.getAbsolutePath() + File.separator + currentDate + "_backup.zip";
OutputStream os = new FileOutputStream(strAbsFilename);
BufferedOutputStream bs = new BufferedOutputStream(os);
ZipOutputStream zo = new ZipOutputStream(bs);
zip(destDir, new File(destDir), zo, true, true);
zo.closeEntry();
zo.close();
saveAll(zipDir);
}
}
catch (Exception e) {
e.printStackTrace();
}
}
public void zip(String path, File basePath, ZipOutputStream zo, boolean isRecursive, boolean isOutBlankDir)
throws Exception {
File inFile = new File(path);
File[] files = new File;
if (inFile.isDirectory()) {
files = inFile.listFiles();
}
else if (inFile.isFile()) {
files = new File;
files = inFile;
}
byte[] buf = new byte;
int len;
for (int i = 0; i < files.length; i++) {
String pathName = "";
if (basePath != null) {
if (basePath.isDirectory()) {
pathName = files.getPath().substring(basePath.getPath().length() + 1);
}
else {
pathName = files.getPath().substring(basePath.getParent().length() + 1);
}
}
else {
pathName = files.getName();
}
if (files.isDirectory()) {
if (isOutBlankDir && basePath != null) {
zo.putNextEntry(new ZipEntry(pathName + "/")); //可以使空目录也放进去
}
if (isRecursive) {
zip(files.getPath(), basePath, zo, isRecursive, isOutBlankDir);
}
}
else {
FileInputStream fin = new FileInputStream(files);
zo.putNextEntry(new ZipEntry(pathName));
while ((len = fin.read(buf)) > 0) {
zo.write(buf, 0, len);
}
fin.close();
}
}
}
public void delete() {
try {
InputStream is = getClass().getResourceAsStream("/config.properties");
prop.load(is);
String dest = prop.getProperty("dst");
File f = new File(dest);
if (f.exists()) {
File[] allFiles = f.listFiles();
for (int i = 0; i < allFiles.length; i++) {
if (allFiles.isFile()) {
allFiles.delete();
}
else {
deleteFolder(allFiles);
}
System.out.println(allFiles.getAbsolutePath());
}
}
}
catch (Exception e) {
System.out.println(e);
}
}
public void deleteFolder(File folder) {
String childs[] = folder.list();
if (childs == null || childs.length <= 0) {
folder.delete();
}
for (int i = 0; i < childs.length; i++) {
String childName = childs;
String childPath = folder.getPath() + File.separator + childName;
File filePath = new File(childPath);
if (filePath.exists() && filePath.isFile()) {
filePath.delete();
}
else if (filePath.exists() && filePath.isDirectory()) {
deleteFolder(filePath);
}
}
folder.delete();
}
public String getAllFiles(File dir, String modifiedDate, String dest, String src) throws Exception {
strBuf = new StringBuffer();
searchDirectory(dir, modifiedDate, dest, src);
save(dest);
return strBuf.toString();
}
public String searchDirectory(File dir, String modifiedDate, String dest,String src) throws Exception {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
File[] dirs = dir.listFiles();
File fileout = new File(dest);
if (!fileout.exists()) {
fileout.mkdirs();
}
for (int i = 0; i < dirs.length; i++) {
if (dirs.isDirectory()) {
searchDirectory(dirs, modifiedDate, dest, src);
}
else {
try {
if ((df.format(new Date(dirs.lastModified())).equals(df.format(df.parse(modifiedDate))))) {
File file = new File(dirs.toString());
FileInputStream fileIn = new FileInputStream(file);
String destDir =
file.getAbsolutePath().substring(src.length(), file.getAbsolutePath().lastIndexOf("\\"));
File temp = new File(dest + destDir);
if (!temp.exists()) {
temp.mkdirs();
}
String strAbsFilename = fileout.getAbsolutePath() + destDir + File.separator + file.getName();
FileOutputStream fileOut = new FileOutputStream(strAbsFilename);
String pathName = strAbsFilename.substring(dest.length());
fileNameBuf.append(pathName);
fileNameBuf.append("\r\n");
byte[] br = new byte;
while (fileIn.read(br) > 0) {
fileOut.write(br);
fileOut.flush();
}
fileIn.close();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
return strBuf.toString();
}
public void save(String dest) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDate = sdf.format(new Date());
File f = new File(dest + "//" + "filelist_"+currentDate+".txt");
FileWriter fout = new FileWriter(f);
BufferedWriter buf = new BufferedWriter(fout);
buf.write(fileNameBuf.toString());
buf.close();
fout.close();
}
catch (Exception e) {
System.out.println(e);
}
}
public void saveAll(String zipdir) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDate = sdf.format(new Date());
File f = new File(zipdir + "//" + "filelist.txt");
FileWriter fout = new FileWriter(f,true);
BufferedWriter buf = new BufferedWriter(fout);
buf.write("\r\n");
buf.write(currentDate);
buf.write("\r\n");
buf.write(fileNameBuf.toString());
buf.close();
fout.close();
}
catch (Exception e) {
System.out.println(e);
}
}
}
#config.properties
src=C:\\etwealth,C:\\China BEA
dst=E:\\tempdir\\backup
zipdir=C:\\tempdir
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